Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | CP471-01 |
| Brand | Yokogawa |
| Product Type | Field Control Processor Module |
| System Platform | CENTUM VP |
| Processor Redundancy | Dual-redundant, 2 modules |
| Vnet/IP Communication | Dual-redundant paths |
| Battery-Backed Memory Retention | Up to 72 hours |
| Minimum Battery Recharge Interval | 48 hours |
| Environment Option | ISA Standard G3 |
| Explosion Protection | Non-explosion-protected (-0 type) |
| Minimum Control Function Release | CENTUM VP R5.01, with specified patches |
| Companion EC401 Style | S3 minimum |
Vnet/IP Communication and Processor Redundancy
The CP471 supports dual-redundant field control processing when two compatible processor modules operate in a duplexed field control unit. The Vnet/IP interface provides dual-redundant communication paths. Confirm the installed control unit, system software release and required patches before replacing a processor.
The battery-backed memory retains data for up to 72 hours under the specified conditions. The battery requires at least 48 hours to recharge. Maintain the prescribed power and recharge conditions to support memory retention.
Frequently Asked Questions (FAQ)
Q: Can two CP471 modules operate in a redundant configuration?
A: Yes. Two compatible CP471 modules can operate in a dual-redundant configuration in a supported duplexed field control unit.
Q: Can the CP471 operate with an older CP461 processor as a redundant pair?
A: No. The CP471 and CP461 cannot coexist as a redundant processor pair. Verify processor compatibility before replacing an installed module.
Q: Which system requirements must be checked before installation?
A: Confirm the field control unit model, CENTUM VP release, required software patches and EC401 style. The supplied specifications identify CENTUM VP R5.01 with specified patches and EC401 Style S3 as the minimum requirements.
Field Installation Guidelines
- Verify that the target field control unit supports the CP471 processor and the intended redundancy configuration.
- Confirm the installed CENTUM VP release, applicable software patches and EC401 style before removing the existing processor.
- Follow Yokogawa’s approved shutdown, isolation and module replacement procedures. Do not remove or insert the module under power unless the applicable hardware documentation explicitly permits it.
- Check module seating, connector condition and chassis compatibility before restoring power.
- Verify Vnet/IP communication status and processor redundancy indicators after installation.
- Allow the battery to recharge for at least 48 hours under the specified conditions when required for memory retention. Do not assume the maximum 72-hour retention period applies regardless of battery condition or operating history.
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